hola
-1280 X N = R
-1280 X 1 = -1280
-1280 X 2 = -2560
-1280 X 3 = -3840
-1280 X 4 = -5120
-1280 X 5 = -6400
-1280 X 6 = -7680
-1280 X 7 = -8960
-1280 X 8 = -10240
-1280 X 9 = -11520
-1280 X 10 = -12800
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